SD card problems:
It's possible that the card might be bad after a certain point; that can happen. Also, I'll mention a couple other things:
Once you have a corrupted file on a memory card, all bets are off for subsequent recordings using the same card, unless you reformat the card in the H4n. The reason is that the file wasn't closed properly, so the FAT32 file system on the card is corrupted and compromised. You might be able to record more files without reformatting the card, but then again, you might not. Since you can't be sure, you should save any existing files on the card by copying them to your PC, then reformat the card in the H4n to rebuild the file system.
When you record in stereo at 96 kHz / 24-bit samples, this is as fast as the H4n can go, and it will write 576,000 bytes of data to the memory card every second (96000 * 2 channels * 3 bytes/sample). A very low price card might not be fast enough to handle this, since memory cards are like CPU chips or computer memory - the faster the device, the more expensive it is. You could get a faster card, or you might consider recording at lower speeds, like 44.1 kHz / 16-bit samples. This will also make the card last longer during recording sessions, without much loss of quality.
- John Santic
Hi Every body , I just joined this forum , Used to be a Studio Rat , I am a Guitar Repair guy and do a LOT of recording .
That said , I just wanted to correct ( Not offend ) John about something , The SD card isnt formatted in FAT32 , It SHOULd be ( have NO IDEA why Zoom would use FAT16 this late in the game ) but it is FAT16 ----->>> Therein is a part of a lot of the problems I am reading about .
FAT16 file size limitations , do not lend well to LONg recordings at Hi Resolution , MP3 , or 16 Bit 48 , yeah , but 24 bit should be kept short , to prevent fragmentation and allocation problems . FAT16 is 16 byte sectors FAT32 is 32 byte sectors and is therefore More capable of dealing with 24 bit Audio (More room for it in each sector ) with 16 bit recording your using each sector to it full capacity .so no fragmentation but at 24 bit it now has to allocate extra room for each portion of audio data
Also the Speed of the Card there are several Classes of SD cards
each being faster data rate than the other , for the Zoom H4n I wouldnt recommend anything less than a Class 6 card especially for MTR mode
At Class 6 , 24 Bit recording at 20 minute sections would probably be ok ..... more than that is iffy .
just my 2 cents , as a semi pro in the Mixing room ( I love a big board )
Also for anyone who owns the H2 and might be interested I build a small Mic pre in a Metal enclosure
Specs = 88 db S/N - Fixed 26 db gain - TRS Stereo in and Out ( or I can Make XLR in and TRS out ) but not with Phantom Power
The preamp is portable and is 9 volt battery powered
That means : AKG C1000s =OK ( has its own battery ) Audio Technica AT822 =OK Battery powered , etc
Any self powered Mic , Stereo Mic , or Matched Pair of Self Powered condensers will benefit GREATLY
Here is how I run it , AT9943 -> My Preamp -> Mic input of the Tascam DR07 ( Mic setting LOW , Limiter ON , Rec Level down to wherever I need it )
Almost ALL MTR digital recorders have Crappy inputs , that is why I built the preamp , ANY 4 Track or or Digital MTR could use this , and a LOT of portable Recorders NEED it .
I can supply audio samples if any are needed with full description .
My Mic pres run about 150 US for the Basic version ( Parts alone cost me 90 , then my time of building it , and they are Hand built )
XLR version 200 .
Once I get some extra time I will try to make an 18 volt Phantom powered version
Nice to meet everybody